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Nexperia USA Inc. 74HCT125D-Q100J
- Part No.:
- 74HCT125D-Q100J
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HCT125D-Q100J.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,495
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Product details
Overview
74HCT125D-Q100 from Nexperia is an automotive-qualified quad 3-state buffer/line driver with TTL-compatible inputs, operating from 4.5 V to 5.5 V, delivering propagation delay as low as 12 ns (VCC = 5 V, CL = 15 pF), and rated for -40 °C to +125 °C ambient temperature - used in automotive body control modules for bidirectional data bus isolation.
For engineers reviewing the 74HCT125D-Q100 datasheet, 74HCT125D-Q100 pinout, 74HCT125D-Q100 application, or 74HCT125D-Q100 equivalent, key selection criteria include TTL-level input compatibility, 3-state output timing (enable/disable times ≤ 42 ns), SO14 package thermal derating (10.1 mW/K above 100 °C), and AEC-Q100 Grade 1 qualification for under-hood electronics.
Technical Context
This device implements four independent non-inverting buffers, each with active-low 3-state enable (nOE) controlling high-impedance output release. Input clamping diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
It operates within JEDEC JESD7A (2.0–6.0 V) and JESD8C (2.7–3.6 V) voltage standards, supports CMOS-level outputs, and features ESD protection per ANSI/ESDA/JEDEC JS-001 (HBM > 2000 V) and JS-002 (CDM > 1000 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with 5 V automotive logic rails and stable operation across battery voltage transients. |
| Propagation Delay | 12 ns (VCC = 5 V, CL = 15 pF) - enables reliable timing in high-speed digital buses up to ~40 MHz. |
| Enable/Disable Time | ≤ 42 ns (VCC = 4.5 V) - guarantees fast bus arbitration and clean signal gating in multiplexed communication paths. |
| Output Drive | ±6 mA (VOH/VOL at VCC = 4.5 V) - sufficient to drive standard 50 pF loads and multiple CMOS/TTL inputs without external buffering. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - matches TTL logic levels, enabling direct interface with legacy microcontrollers and sensors. |
| Operating Temperature | -40 °C to +125 °C - validated for engine bay, transmission control, and ADAS sensor interface locations. |
| AEC-Q100 Grade | Grade 1 - qualified for automotive applications requiring full temperature range compliance and extended reliability testing. |
Pinout & Package
74HCT125D-Q100 uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm lead pitch, with gull-wing leads and moisture sensitivity level (MSL) 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | nOE (active-low output enable) | Independent control per buffer; HIGH forces output into high-impedance state, enabling bus sharing. |
| 2, 5, 9, 12 | nA (data input) | Non-inverting input for each buffer; accepts TTL-level signals directly without level-shifting. |
| 3, 6, 8, 11 | nY (data output) | CMOS-compatible buffered output; drives loads up to ±6 mA while maintaining rail-to-rail swing. |
| 7 | GND | Reference ground for all I/O and supply; must be low-inductance connection to minimize switching noise. |
| 14 | VCC | Primary power supply; decoupling capacitor (100 nF ceramic) required within 5 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use including temperature cycling, humidity testing, and mechanical shock per AEC standard. |
| TTL-compatible input thresholds | VIH ≥ 2.0 V and VIL ≤ 0.8 V at VCC = 4.5–5.5 V - eliminates need for external level translators when interfacing with legacy MCU GPIOs. |
| Clamp diode protected inputs | Enables safe connection to voltages up to VCC + 0.5 V using series current-limiting resistors - critical for mixed-voltage subsystems. |
| Low dynamic power dissipation | CPD = 24 pF - reduces switching current and heat generation in high-frequency bus applications (e.g., LIN or local sensor networks). |
| High noise immunity | Typical noise margin > 0.8 V at VCC = 5 V - suppresses false triggering from EMI in electrically noisy vehicle environments. |
Applications
| Automotive Body Control Unit (BCU) | Instrument Cluster Data Multiplexing |
|---|---|
|
Use Scenario: Isolating CAN/LIN peripheral signals from shared microcontroller GPIO banks during firmware updates. IC Role / Device Role / Timing Role: Quad 3-state buffer providing controlled signal gating between MCU port pins and external transceivers. Use Value: Prevents bus contention during reconfiguration by enabling/disabling individual lines with sub-42 ns timing precision. |
Use Scenario: Driving segmented LED displays and analog gauge drivers from a single microcontroller port with shared address/data lines. IC Role / Device Role / Timing Role: Level-shifting and fan-out buffer ensuring TTL-compatible drive strength and clean edge transitions. Use Value: Eliminates ghosting and flicker by maintaining <15 ns transition time and >6 mA output current per segment. |
| ADAS Camera Interface Buffering | Engine Control Module (ECM) Sensor Bus Isolation |
|
Use Scenario: Interfacing MIPI CSI-2 parallel debug signals to diagnostic test equipment via 5 V logic domain. IC Role / Device Role / Timing Role: Signal integrity-preserving buffer isolating high-speed image data lanes from noisy power domains. Use Value: Delivers 12 ns propagation delay and <10 ns transition time to maintain setup/hold margins for 25 MHz pixel clocks. |
Use Scenario: Isolating oxygen sensor analog front-end signals from digital control logic during cold-start conditions. IC Role / Device Role / Timing Role: Fault-tolerant buffer with input clamp diodes protecting against transient overvoltage on sensor lines. Use Value: Survives load-dump events up to VCC + 0.5 V due to integrated input clamping, reducing external protection component count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HCT125PW-Q100 | TSSOP14 (SOT402-1) package; 7.3 mW/K thermal derating above 81 °C vs. SO14's 10.1 mW/K above 100 °C. | Better PCB space efficiency but lower thermal mass; requires tighter layout control for high-power density designs. | Select for compact layouts where board area is constrained and peak ambient stays below 81 °C. |
| SN74HCT125QPWRQ1 | Texas Instruments variant; identical electrical specs but different AEC-Q100 test report structure and packaging traceability. | Same functional behavior; TI's qualification documentation may align better with OEM-specific audit requirements. | Choose when TI's supply chain integration or documentation format is mandated by Tier-1 procurement policy. |
Compared with 74HCT125PW-Q100, the D-package offers superior thermal stability above 100 °C and easier manual inspection; versus SN74HCT125QPWRQ1, it provides identical performance with Nexperia's optimized SO14 footprint and broader distribution channel support.
Availability
74HCT125D-Q100 is available at Aetrix Electronics and suitable for automotive body control units, instrument cluster interfaces, ADAS camera debug links, and engine control module sensor isolation requiring stable component supply across extended temperature ranges.
Supply support for 74HCT125D-Q100 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Nexperia is a global semiconductor expert specializing in high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74HCT125-Q100 belongs to Nexperia's automotive-qualified logic family, designed specifically for robust signal buffering and bus isolation in harsh-temperature vehicle subsystems.
FAQ
Is 74HCT125D-Q100 pin-compatible with standard 74HCT125 devices?
Yes - it shares identical pinout, electrical characteristics, and functional behavior with industry-standard 74HCT125 logic, including the same SO14 (SOT108-1) footprint and 14-pin assignment. The "-Q100" suffix denotes AEC-Q100 qualification but does not alter physical or logical interface.
What is the maximum capacitive load this device can drive reliably?
74HCT125D-Q100 is characterized up to 50 pF load capacitance per output, with propagation delay and transition time specifications guaranteed under those conditions. Driving >50 pF may increase delay and reduce edge rate, requiring verification via board-level signal integrity analysis.
Can this buffer operate at 3.3 V supply?
No - the 74HCT125D-Q100 is specified only for 4.5 V to 5.5 V operation. For 3.3 V systems, use the 74HC125D-Q100 variant (CMOS-input version), which supports 2.0 V to 6.0 V but requires compatible input voltage levels.
Does the device require external pull-up or pull-down resistors on nOE pins?
No - nOE inputs have internal weak pull-downs (typical IIK = ±20 μA at VI < −0.5 V or > VCC + 0.5 V), but for deterministic startup behavior, a 10 kΩ external pull-down is recommended to ensure outputs remain disabled until firmware asserts enable control.
74HCT125D-Q100J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 1
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 6mA, 6mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
74HCT125D-Q100J FAQ
1.How can I place an order for 74HCT125D-Q100J through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT125D-Q100J on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 74HCT125D-Q100J reliable?
The price and inventory of 74HCT125D-Q100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT125D-Q100J is usually 5 days.
3.What payment methods are accepted for 74HCT125D-Q100J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT125D-Q100J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT125D-Q100J?
74HCT125D-Q100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT125D-Q100J order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 74HCT125D-Q100J?
For technical support, including 74HCT125D-Q100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT125D-Q100J requirements.
6.How does Aetrix verify that 74HCT125D-Q100J is sourced from the original manufacturer or authorized distributors?
All 74HCT125D-Q100J products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74HCT125D-Q100J meets industry standards.
7.What is the process for return or replacement of 74HCT125D-Q100J?
All 74HCT125D-Q100J units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT125D-Q100J, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 74HCT125D-Q100J part is unused and in its original packaging.
Return procedure for 74HCT125D-Q100J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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